Trolley-pole head



S. S. COOPER.

TROLLEY POLE HEAD.

APPLICATION FILED MAY i6, 1919.

1,353,381 PatentdSept. 21, 1920;"

UNITED ENT SAMUEL 34 1 3 owners; wEsT vmemi- VTROTVLLEY-POLE HEAD.

' To all whom it may concern:

, duetion of the current from the trolley wire 7 to the locomotive'by a meanswhich will not] in any wayv interfere with the separation vof the sections of the head: under; emergency;

Be it known that I, SAMUEL S; Coornn, a

citizen of the United State's, residing at Landgrafl, in the county or" McDowell and State: of West Virginia, have invented cer tain new and useful Improvements in Trol ley-Pole Heads, of c which the h following is a specification.

This invention relates to improvements -introlley pole heads and is especially di-.

rectedto the heads of trolleypolesupon mine locomotives although'it istnot limited to this specifiou'se as it'may 'be-.-e'mployed upon other trolley poles ifl'fo'und'desirable, 1.1 g In the operation of mine locomotives serious accidents are not infrequentlyoaused" through the catching ofthe'trolley; pole head the frogs of the overhead trolley system, the guy wires, and other parts in ithe path ofmovementof the pole when ;the pole leaves the wire. L When this occurs the,

pole is either torn loose from theilocomotive or "the trolley wires are torn down,f and even" if there are no more serious results',= delay is -occasioned in the making ofvthe-necessary The present invention therefore has asits primary objecttmprovide aitrolv ley. pole headjso constructed that in the event the headis .caughtfin a frog, or leaves, the trolley-wire and strikes an obstruction,- 'no injury to the; head or wires or. to the crew ofthelo'comotivewill be caused; a

repairs.

"Briefly: stated, the invention resides: in forming the head in-two sections normally heldfconnected or in assembledrelation bya means adapted to yield when oneof thesections comes into engagement with, an obstructionor is caught in a-frog, so as to per-1 unit of separation of-the engagedsection i fromI'the other section which is permanently carried by the pole, and another object of the invention' isto provide for proper cone conditions. e; In the. accompanying draw ngs:

view the line 2-2 polel andsecured in: place by screws, rivets,:

Figured is a side elevation of aitrolley pole e w Patented Sept. 21,;19205 I Application filedlVIay 16,1919; Seria1:N o.'297, l75.1-

' F g- E is'a-rearelevation flt r t e head detached,

mounted and the said head, vwhich is indiferrule 5 which is fitted onto the end iof the c cated' in general by the numeral; 2, comprises twov sections oneindicated: by the "numeral; 3 and the other by lthfernumera'l 4'. The,

section 3 ofthe head is in the'nature-Wofgaa j or-any othersuitable fastening el ements' indicated by the numeral- 6' and as clearlyshown in Figs. 2 and .8 of thedrawings. As this section is to be'a conductor of the electrical current, it is, of; course; formed of;

metah'and in order that the usual conduct V ing' cable- (not shown) may: be electrically connectedtherewith, a boss 7- is formed-upon the underside ofithe ferruleg5 --and-hasa socketior opening 8 formedthereinot o rek ceive thegterminal-gofithe cable; theterminalv being securedby one or more binding screws 9 threaded preferably through one side of" the.- said boss; The ferrule 5 is preferably tapered in'the direction of its upperor outer end which end is preferably elosed asindicated bytheinumeral 10, and the said ferrule may be of any suitable length and otherwise of any desired dimensionsj The section l .of-the head? is in the nature of a sleeve indicated-by the numeral, 11 and having its bore 12 tapered so as to" more or less snugly receivethe ferrule .57 asI-shown in Figs. 2 and 8 ofthe drawings.

By-reference to Figk3lit will be observedi.

that the sleeve .11 is formed in its undersidefl with a slot 13. opening hr ug h i low end of; the sleeve and'm reorleSssnugly-L I receiving the-boss 71 Whenthe sleeve is fitted. onto the ferrule 5. ;Due to the engagement of the side walls of the slot 13 against the oppositeside faces oftheboss 7,,1the sleeve 11 will be held- 'a gainst lrotation upon; the

ferrule 5- and consequently the said sleeve, 11'

'is supported in substantially the same manner as though fixeddirectly upon the end of the trolley pole 'l'asis customaryin the case of ordinarytrolleyjheads. While the. sleeve 11- is held against rotation orturning. movement upon the ferrule 5, theseparts may separate through relative movement in the direction ofwtheir lengths; Means,-

however,-is;provided for normally holding the two sections ofthe head assembled, the

means being, however, yieldable so as to permit of separation of the sections under emergency conditions as will be presently described. The holding means just referred to comprises detents, indicatedin general'by '20 "having a beveled or rounded' face 21 these faces of'the heads of the two detent devices being presented toward each otheras clearly shown in Fig. 2 of thedrawings. The ferrule 5'is formed exteriorly at dia- '7 metrically opposite points with seats 22 receive the heads 20 in the man U ner shown in Fig.2 of the drawings and it;

designed to will now-be understood that whenthe sec; tion4 comprisingthe sleeve 11 is fitted onto "the section 2 comprising the ferrule 5,-the. heads 20 of the detent devices will spring" into engagement in the seats 22 and will thus serve to normally 1 hold the parts assembledl' However, due to the'beveling' or rounding of the faces 21' of the heads 20 and the'corre'sponding formation of the seats 22,

any pulling apart" stress exerted upon the? sections "in the direction of their axes will i a result in the heads 20 of the detent-devices permitting'of the separation of these'ction riding out of their respective seats, thus 4 from the section 3. Inasmuch as the engagement of the boss 7 within the slot 13 serves to prevent rotation of the sleeve 11- upon the ferrule 5,'the springs 17 of the detent devices will, of course, be relieved of any stress which would otherwise be imposed upon them if some means were not provided for preventing rotation of the said sleeve upon the ferrules. F urthermore, in assembling the parts there will be certainty of V the heads 20 of the detent'devicesengaging in their seats when thesleeve 11 is so posi-' tioned that the boss 7 Wlll enter the slot 13 as the parts are sho'ved together. I

The section 2 comprising the sleeve 4:, is

providedat its upper end withaharp supporting head indicated in general by the numeral 23, this head having a flat supporting upper face 2% andbeing'formed with, an opening 25 extending vertically therethrough and at right angles to the said face 24; Theharp is'indicated ingeneral by the numeral 26 and the same comprises a base portion 27 and upstanding cheek pieces 28' provided with bearings 29 at their upper ends for the reception of theendsof the I trolley wheel spindle indicated by the-nu} meral 30, the said wheel being indicated by the numeral 31 and'being ofthe usual type.

The base 27 of the harp is formed an opening 32, and a swivel bolt 33 is fitted through this opening and through the opening 25 so as" to mount the'harp 26 for turn ing movement upon the supporting face 24 of the head 23. A nut 34 is threaded onto the lower end of the bolt and is provided usual, pull; rope (not shown) by which the pole may be loweredor swung downwardly with an eye 35 for the connection of the against the tension of the usual springs,

which normally hold it in elevated position.

In order that the. trolley wheel v31 may be.

mounted in centered position between the cheek pieces 28 and ;in,order that the electric current may be most effectually transmitted through the wheel to the harp and thence to; the section 3 and finally to the section 1.;

Leaf springbearingmembers 36 are secured to the inner faces of the cheek pieces 28-and are sprung inwardly with relation to v the planes of thesefaces and are provided at their upper ends with ears .37 apertured Vfor the passage of the -spindle30, these cars.

bearing against the opposite ends of the hub of the wheel 31. e f

In order that-the turning=,movement of theharp upon the head'23may be limited,

the head is formed at its forward side with an upstanding abutment lugn38, and the base portion 27 of the harp is formed at diametrically opposite sides with abutment:

lugs-39 adapted to strike the lug 38 for the purposeistated. a e I a ,Having thus described the'invention, what is-claimed as newis:

1 1. Atrolley pole head comprisinga pole? section, ahar'p section slidably fitted on the end of the'pole section and having a longi i tudinal notch'in' itslower end, a connection. for an electrical conductor carried by .:the. pole section and engaging in said notch to:

prevent turning of the harp sectionwith relation to the pole section, and means yield ably resisting'sliding movement-of the harp section; y

v 2. A trolley pole head comprising a pole;

section,aharp section separably assembled therewith, and a'resilient detent carried by one of the sections and coacting with the' other section to yieldably resist separation of -'the sections, said detent being housed withinthe harp sectionin the'normalposie tion of theparts,

3. A trolley pole head comprising afpole section provided at its opposite sides .with seats, a harp section slidably fitted on the pole section, means to prevent'rotation of the harp section, and resilient detent-"members carried by the'harp section andv engag-i ing in'said seats to yielda'bly'resist separa-v tion of the sections. I I

4. A trolley pole head comprising apole' section provided at its opposite sideswith seats, a harp section slidably fitted on the pole section, resilient detent members carof the harp section upon the pole section and means for connecting an electrical conductor to said projection. V

5. A trolley pole head comprising apolc section having diametrically opposite seats; in its outer face, a harp section fitted loosely upon the pole section and provided at its lower end with longitudinal notch and springs securedat their upper ends within the upper ends of said grooves and provided at their free ends with heads to engage the seats in thepole section, a projection on the V o pole section fitting within the notchin the harp section to prevent rotation of the harp 7 section, and means for securing an electrical conductor to said projection.

In testimony whereof I aflix my signature,

SAMUEL s. COOPER; v L 5.

i5 1 l with longitudinal grooves in its inner-surface out of alinement with said notch, leaf 

